1111211321 has 4 divisors (see below), whose sum is σ = 1212230544. Its totient is φ = 1010192100.

The previous prime is 1111211317. The next prime is 1111211323. The reversal of 1111211321 is 1231121111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1111211321 - 2² = 1111211317 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1111211296 and 1111211305.

It is not an unprimeable number, because it can be changed into a prime (1111211323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50509595 + ... + 50509616.

It is an arithmetic number, because the mean of its divisors is an integer number (303057636).

Almost surely, 2^1111211321 is an apocalyptic number.

1111211321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1111211321 is a deficient number, since it is larger than the sum of its proper divisors (101019223).

1111211321 is a wasteful number, since it uses less digits than its factorization.

1111211321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101019222.

The product of its digits is 12, while the sum is 14.

The square root of 1111211321 is about 33334.8364477764. The cubic root of 1111211321 is about 1035.7753052577.

Adding to 1111211321 its reverse (1231121111), we get a palindrome (2342332432).

The spelling of 1111211321 in words is "one billion, one hundred eleven million, two hundred eleven thousand, three hundred twenty-one".